diff --git a/app/missions/layout.tsx b/app/missions/layout.tsx
index f97c0c79..53c2cbf4 100644
--- a/app/missions/layout.tsx
+++ b/app/missions/layout.tsx
@@ -13,19 +13,19 @@ export default function MissionsLayout({
   
   return (
     <div className="flex h-screen overflow-hidden">
-      {/* Sidebar - simple with just nav items */}
-      <div className="w-[235px] min-w-[235px] bg-white overflow-y-auto">
-        <nav className="py-0">
+      {/* Sidebar - precise sizing to match Courrier */}
+      <div className="w-[234px] min-w-[234px] bg-white border-r border-gray-100 overflow-y-auto">
+        <nav>
           <Link href="/missions" passHref>
-            <div className={`px-6 py-3 ${pathname === "/missions" ? "bg-slate-100" : "hover:bg-slate-50"}`}>
-              <span className="text-sm font-medium">Mes Missions</span>
+            <div className={`px-6 py-[10px] ${pathname === "/missions" ? "bg-gray-50" : ""} hover:bg-gray-50`}>
+              <span className="text-sm font-normal text-gray-700">Mes Missions</span>
             </div>
           </Link>
         </nav>
       </div>
       
-      {/* Main content - full-width, no padding */}
-      <div className="flex-1 overflow-auto">
+      {/* Main content - no padding, full container */}
+      <div className="flex-1 overflow-hidden">
         {children}
       </div>
     </div>
diff --git a/app/missions/page.tsx b/app/missions/page.tsx
index ce883876..8efe3d6d 100644
--- a/app/missions/page.tsx
+++ b/app/missions/page.tsx
@@ -47,69 +47,71 @@ export default function MissionsPage() {
   );
   
   return (
-    <div 
-      className="min-h-screen bg-cover bg-center"
-      style={{
-        backgroundImage: "url('https://images.unsplash.com/photo-1483921020237-2ff51e8e4b22?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1170&q=80')"
-      }}
-    >
-      <div className="pt-0">
-        <div className="flex items-center justify-between bg-black bg-opacity-30 px-4 py-2 mb-4">
-          <h1 className="text-white text-sm font-normal">Gérez vos missions et opportunités de bénévolat</h1>
-          <div className="flex items-center">
-            <div className="relative mr-2">
-              <Search className="absolute left-2 top-1/2 transform -translate-y-1/2 text-gray-500 h-4 w-4" />
-              <Input
-                placeholder="Rechercher une mission..."
-                className="pl-8 pr-2 py-1 text-sm h-8 bg-white border-0 rounded-sm w-48"
-                value={searchTerm}
-                onChange={(e) => setSearchTerm(e.target.value)}
-              />
-            </div>
-            <Link href="/missions/new">
-              <Button className="bg-blue-600 hover:bg-blue-700 text-white h-8 text-sm px-3 py-0 rounded-sm">
-                <Plus className="h-3.5 w-3.5 mr-1" />
-                Nouvelle Mission
-              </Button>
-            </Link>
+    <div className="flex flex-col h-full">
+      <div className="flex justify-between items-center bg-black/30 py-[6px] px-4">
+        <h1 className="text-white text-xs font-normal">Gérez vos missions et opportunités de bénévolat</h1>
+        <div className="flex items-center gap-2">
+          <div className="relative">
+            <Search className="absolute left-2 top-1/2 transform -translate-y-1/2 h-3.5 w-3.5 text-gray-500" />
+            <Input
+              placeholder="Rechercher une mission..."
+              className="h-8 pl-7 pr-2 py-1 text-xs bg-white border-0 rounded-none w-48"
+              value={searchTerm}
+              onChange={(e) => setSearchTerm(e.target.value)}
+            />
           </div>
+          <Link href="/missions/new">
+            <Button className="h-8 rounded-none bg-blue-600 hover:bg-blue-700 text-white px-3 py-0 text-xs">
+              <Plus className="h-3.5 w-3.5 mr-1" />
+              Nouvelle Mission
+            </Button>
+          </Link>
         </div>
-        
-        <div className="px-4 grid grid-cols-1 md:grid-cols-3 gap-4">
+      </div>
+      
+      <div 
+        className="flex-1 bg-cover bg-center p-0 overflow-auto"
+        style={{
+          backgroundImage: "url('https://images.unsplash.com/photo-1483921020237-2ff51e8e4b22?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1170&q=80')"
+        }}
+      >
+        <div className="grid grid-cols-1 md:grid-cols-3 gap-0 p-0">
           {filteredMissions.map((mission, index) => (
-            <div key={mission.id} className="bg-white rounded-sm shadow-md overflow-hidden max-w-full mx-0">
-              <div className="p-0">
-                <div className="flex items-center justify-between px-4 pt-4 pb-2">
-                  <span className="inline-block px-2 py-1 text-xs bg-gray-100 text-gray-800 rounded-sm">
-                    {mission.category}
-                  </span>
-                  <span className="text-xs text-gray-500 px-2 py-1 border border-gray-200 rounded-sm">
-                    {mission.duration}
-                  </span>
-                </div>
-                
-                <div className="px-4 pb-4">
-                  <h2 className="text-base font-semibold mb-1">{mission.title}</h2>
-                  <p className="text-sm text-gray-600 mb-4">Location: {mission.location}</p>
-                  
-                  <div className="flex flex-wrap gap-1 mb-4">
-                    {mission.skills.map(skill => (
-                      <span key={skill} className="bg-gray-100 text-gray-700 px-2 py-1 rounded-sm text-xs">
-                        {skill}
-                      </span>
-                    ))}
+            <div key={mission.id} className="p-4">
+              <div className="bg-white shadow-md overflow-hidden h-full">
+                <div className="p-0">
+                  <div className="flex justify-between items-center px-4 pt-4 pb-2">
+                    <span className="bg-gray-100 px-2 py-1 text-xs rounded-sm font-normal text-gray-800">
+                      {mission.category}
+                    </span>
+                    <span className="text-xs text-gray-500 px-2 py-1 border border-gray-200 rounded-sm font-normal">
+                      {mission.duration}
+                    </span>
+                  </div>
+                  
+                  <div className="px-4 pb-4">
+                    <h2 className="text-base font-medium mb-2">{mission.title}</h2>
+                    <p className="text-sm text-gray-600 mb-4">Location: {mission.location}</p>
+                    
+                    <div className="flex flex-wrap gap-1 mb-4">
+                      {mission.skills.map(skill => (
+                        <span key={skill} className="bg-gray-100 text-gray-700 px-2 py-1 rounded-sm text-xs">
+                          {skill}
+                        </span>
+                      ))}
+                    </div>
+                  </div>
+                  
+                  <div className="flex justify-between items-center px-4 py-2 border-t border-gray-100">
+                    <span className="text-xs text-gray-500">
+                      Créée le {mission.createdAt.replace('2023-', '')}
+                    </span>
+                    <Link href={`/missions/${mission.id}`}>
+                      <Button className="bg-black text-white text-xs px-3 py-1 h-6 rounded-none">
+                        Voir détails
+                      </Button>
+                    </Link>
                   </div>
-                </div>
-                
-                <div className="flex justify-between items-center px-4 py-2 border-t border-gray-100">
-                  <span className="text-xs text-gray-500">
-                    Créée le {mission.createdAt.replace('2023-', '')}
-                  </span>
-                  <Link href={`/missions/${mission.id}`}>
-                    <Button className="bg-black text-white text-xs px-3 py-1 h-7 rounded-sm">
-                      Voir détails
-                    </Button>
-                  </Link>
                 </div>
               </div>
             </div>